Pressure-regulating valve.



PATENTED MAY 12, 1908.

S. YBARRA. PRESSURE REGULATING VALVE.

APPLICATION FILED JAN. 30, 1908.

Ma F/ Z M MR M Y L E U M A 5 WITNESSES a A TTOHNE Y8 UNITED STATES SAMUEL YBARRA, OF ST. LOUIS, MISSOURI.

PBE SSURE -RE GULATING VALVE Specification of Letters Patent.

Application filed. January 30, 1908.

Patented May 12, 1908.

Serial No. 413,352.

To all whom it may concern:

Be it known that I, SAMUEL YBARRA, a citizen of the United States, and a resident of St. Louis, in the State of Missouri, have made certain new and useful Im rovements in Pressure-Regulating Valves, 0 Which the following is a specification.

My invention isan improvement in pressure regulating valves, and consists in certain novel constructions and combinations of arts hereinafter described and claimed.

eferring to the drawings forming a part hereofFigure 1 is a longitudinal section through the valve showing the plunger in one osition. Fig. 2 is a similar view showing t e plunger in another position. Fig. 3 is a bottom view of the plunger, and Fig. 4 is a longitudinal section through a modified form of valve.

In the present embodiment of my invention, the valve casing 1, is provided with a central longitudinal bore 2, in which moves .the plunger 3, the said casing having at about the longitudinal center thereof an inlet opening 5, and an outlet opening 6 communlca-ting with the bore.

The plunger 3 is cylindrical in form, and is provided at approximately its center with oppositely arranged recesses 4 and 4", ada te to register with the inlet and the out et respectively, when the plunger is in its lowermost osition as shown in Fig. 1. The lower end 0 the plunger is recessed as at 7, and passages 8 and 9 place the recesses 4 and 4 respectively in communication with the said recess 7. The passa e 9 also communicates with the recess 4 at the upper end thereof.

An auxiliary casing 11 is secured to the open end of the casing 1, the said auxiliary casing being provided with a flange 12, threaded on to the end of the casing, and the bore 13 of the auxiliar cates with the bore 2-of t e casing 1.

The upper end of the plunger 3 is provided with a pin 10, to which is secured one end of a spring 14, the other end of the spring bein connected with a pin 15, which is enga ed by a screw 16, threafed t the auxiliary casin and having its outer end s uared as at 1'7 ibr engagement bf a tool w ereby to rotate said screw, and a ock nut 18 is provided for locking the screw in its adjuster position. v

.In operation, fluid being admitted to the valve through the recess 5, passes through the-passage 8into the recess 7, thus acting to casing communihrough the en offorce the lunger upward into the position shown in ig. 2. Since the passage connecting the recesses 4 and 4 is restricted, only a certain amount of motive fluid may pass therethrough, and an excess of pressure acts upon the bottom of the plunger to move it upward against the resistance of the spring.

pressure through the passage between the tent. As long as this pressure remains cons ring. retaining it in its lowermost position. Should, however, there be any material increase in the ressure, the plunger will be moved upwar to partially cut off the inlet and the outlet, thus reducing the pressure in the casing.

In the construction shown in Fig. 4, the casing 19 is provided with a longitudinal bore 20, in which moves-the plunger 21. The outlet 22 opens into the bottom of the bore as shown at 23, and the inlet 24 leads from approximately the center of the bore. The plunger is cut away-near its lower end to form a petticoat 25, adapted to close the inlet 24, the lower end 26 of the plunger being adapted to close the outlet opening 23. The upper end of the plunger has rotatably connected therewith a screw threaded rod 27, threaded through the end of an auxiliary casing 28, which is threaded on to the main casing, and the outer end of the rod is provided with a hand wheel 29 for convenience in manipulating the same. It will be no ticed from an inspection of Fig. 4, that the petticoat 25 closes the inlet 24 completely,

the bottom of the bore to close the outlet opening 23. The above described form of valve is especially adapted for controlling hi h ressures, since the petticoat closes the inlbt before the bottom of the plunger engages the bottom of the bore to close the outlet opening.

I claim- Y 1. A pressure regulating valve, comprising a casing having a longitudinal bore, and revided at approximately its longitudinal center with inlet, and outlet openings, a plunger movable in the bore and provided at a proximately its center with recesses adapted to register with the inlet and the out openings when the plunger is in its lowermost position, the lower end of the plunger being recessed, and said plunger being pro- By regulating the tension of the spring, the

efo're thelower end 26 of the plunger engages recesses may be regulated to any desired exstant, the plunger will not be acted upon, the l vided with passages leading from the first named recesses to the bottom recess, one of said passages communicating with both recesses, a spring for normally retaining the plunger in its lowermost position, and means for regulating the tension of the spring.

2. A pressure re lating valve, comprising a casing having a ongitudinal bore, and an inlet and an outlet leading from a proximately the longitudinal center of the ore, a lunger movable in the bore, said plunger being provided with a passage for placing the inlet and the outlet in communication when said plunger is at the lower end of the casing, and with a passage leading from the inlet to the bottom of the plunger, a spring for normally retaining the plunger in lts lowermost position, and means for adjusting thetension of the spring. Y

3. A pressure regulating valve comprising a casing provided with an inlet and an outlet, a plunger movable in the casing, said plunger having a passage for placing the inlet and the outlet in communication when the plunger is in one position, and having a 'fluid between the end of the plunger and the casing, to move said plunger to cut ofi the communication between the inlet and the outlet, a spring acting to normally maintain the plunger in position to place the inlet and theoutlet in communication, and means for regulating the tension of the spring.

4. A pressure regulating valve, comprising a casin provided with an inlet and an outlet, a plunger movable in the casing and normally connecting the inlet and the outlet, means in connection with the plunger and the casing for admittingthe motive fluid to one end of the plunger to move the same, whereby to cut ofi thecommunication between the inlet and the outlet, a spring acting normally to prevent such movement of the plunger, and means for adjusting the tension 

